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排序方式: 共有138条查询结果,搜索用时 156 毫秒
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Gluhcheva Y Ivanov I Atanasov V Antonova N Ivanova J Mitewa M 《Clinical hemorheology and microcirculation》2011,49(1-4):417-422
The study evaluated the affect of chronic cadmium (Cd) and monensin treatment on some hematological parameters and its relationship with the rheological variables. Adult male mice were subjected to chronic treatment with cadmium acetate [Cd(CH3COO)2 × 2H2O] (group 1), Cd(CH3COO)2 × 2H2O followed by treatment with low dose monensin (group 2) and Cd(CH3COO)2 × 2H2O followed by high dose monensin treatment (group 3). Cd(CH3COO)2 × 2H2O and deprotonated monensin were dissolved in distilled water and given daily to the experimental animals. Mice drinking distilled water served as a control group (group 4). Hematological parameters and erythrocyte morphology were evaluated in parallel with whole blood viscosity (WBV). Cd treatment reduced Hb and increased RDW. The addition of high dose monensin significantly improved erythrocytic indices compared to the control. Erythrocyte anisocytosis was observed in blood smears of Cd-treated mice corresponding to the increased RDW. WBV was significantly elevated in the experimental groups in the whole range of shear rates compared to the control group and in groups 2 and 3 was lower than in group 1 but remained higher compared to group 4. Correlations were found between WBV and RBC, Hb, Hct, MCV and RDW. The results suggest that hemorheological parameters such as WBV should be monitored in parallel with the hematological parameters when monensin is applied and heavy metal intoxication is suspected. 相似文献
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Dissecting human cytomegalovirus gene function and capsid maturation by ribozyme targeting and electron cryomicroscopy 下载免费PDF全文
Yu X Trang P Shah S Atanasov I Kim YH Bai Y Zhou ZH Liu F 《Proceedings of the National Academy of Sciences of the United States of America》2005,102(20):7103-7108
Human CMV (HCMV) is the leading viral cause of birth defects and causes one of the most common opportunistic infections among transplant recipients and AIDS patients. Cleavage of internal scaffolding proteins by the viral protease (Pr) occurs during HCMV capsid assembly. To gain insight into the mechanism of HCMV capsid maturation and the roles of the Pr in viral replication, an RNase P ribozyme was engineered to target the Pr mRNA and down-regulate its expression by >99%, generating premature Pr-minus capsids. Furthermore, scaffolding protein processing and DNA encapsidation were inhibited by 99%, and viral growth was reduced by 10,000-fold. 3D structural comparison of the Pr-minus and wild-type B capsids by electron cryomicroscopy, at an unprecedented 12.5-angstroms resolution, unexpectedly revealed that the structures are identical in their overall shape and organization. However, the Pr-minus capsid contains tenuous connections between the scaffold and the capsid shell, whereas the wild-type B capsid has extra densities in its core that may represent the viral Pr. Our findings indicate that cleavage of the scaffolding protein is not associated with the morphological changes that occur during capsid maturation. Instead, the protease appears to be required for DNA encapsidation and the subsequent maturation steps leading to infectious progeny. These results therefore provide key insights into an essential step of HCMV infection using an RNase P ribozyme-based inhibition strategy. 相似文献
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N A Atanasov 《Clinical chemistry》1990,36(4):701-702
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Andreas Andreou Benjamin Struecker Nathanael Raschzok Felix Krenzien Philipp Haber Simon Wabitsch Christoph Waldbaur Eva-Maria Touet Anne-Christine Eichelberg Georgi Atanasov Matthias Biebl Marcus Bahra Robert Öllinger Moritz Schmelzle Johann Pratschke 《Surgical oncology》2018,27(4):751-758
Background
Minimal-invasive hepatectomy (MIH) has been increasingly performed for benign and malignant liver lesions with most promising results. However, the role of MIH for the treatment of patients with hepatocellular carcinoma (HCC) needs further investigation.Methods
Clinicopathological data of patients who underwent liver resection for HCC between 2005 and 2016 were assessed. Postoperative outcomes und long-term survivals of patients following MIH were compared with those of patients undergoing conventional open hepatectomy (OH) after 1:1 propensity score matching.Results
During the study period, 407 patients underwent liver resection for HCC with curative intent. Fifty-six patients underwent MIH and were compared with a matched cohort of 56 patients who underwent OH. The rate of patients with fibrosis/cirrhosis (82% vs. 86%, p?=?0.959), multiple lesions (32% vs. 32%, p?=?1.00), tumor size >30?mm (61% vs. 55%, p?=?0.566), and major resection (16% vs. 16%, p?=?1.00) was comparable between the two groups (MIH vs. OH). MIH was associated with lower 90-day complication rate (32% vs. 54%, p?=?0.022), lower postoperative major complication rate (14% vs. 30%, p?=?0.041), lower liver failure rate (0% vs. 7%, p?=?0.042), lower 90-day mortality rate (0 vs. 7%, p?=?0.042), and shorter length of hospital stay (9 vs. 12 days, p?=?0.009) compared to OH. After a median follow-up time of 51 months, MIH and OH showed comparable 5-year overall survival (54% vs. 41%, p?=?0.151), and 5-year disease-free survival rates (50% vs. 38%, p?=?0.956).Conclusions
MIH for HCC is associated with lower postoperative morbidity and mortality and shorter length of hospital stay, resulting in oncologic outcomes similar to those achieved with the established OH. Our findings suggest that MIH should be considered as the preferred method for the treatment of curatively resectable HCC. 相似文献10.